The kind of infection would be a fungus infection, since you mention thickening and discoloration of the nail.
Answer: A. It increased both her intensity and her workout time
Intensity is how hard you exercise and workout time is how long you exercise your body. By adding another mild, she is increasing her intensity and her workout time. Hope this helps :)
The moat reasonable answer would be D. follow a balanced diet and a moderate exercise plan.
